EP3079145A1 - Procédé et appareil anti-scintillation destinés à l'image d'un appareil d'affichage à cristaux liquides 3d - Google Patents

Procédé et appareil anti-scintillation destinés à l'image d'un appareil d'affichage à cristaux liquides 3d Download PDF

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Publication number
EP3079145A1
EP3079145A1 EP14867220.7A EP14867220A EP3079145A1 EP 3079145 A1 EP3079145 A1 EP 3079145A1 EP 14867220 A EP14867220 A EP 14867220A EP 3079145 A1 EP3079145 A1 EP 3079145A1
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EP
European Patent Office
Prior art keywords
backlight
temperature
liquid crystal
mapping relationship
crystal display
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Ceased
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EP14867220.7A
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German (de)
English (en)
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EP3079145A4 (fr
Inventor
Yanxing QI
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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Publication of EP3079145A1 publication Critical patent/EP3079145A1/fr
Publication of EP3079145A4 publication Critical patent/EP3079145A4/fr
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment of the illumination source

Definitions

  • the present invention relates to the field of 3D display, and in particular, to an anti-crosstalk method and apparatus for an image of a 3D liquid crystal display apparatus.
  • Methods for implementing a 3D function in a shutter 3D TV scheme mainly include backlight partition scanning and black field insertion, and no matter which implementation scheme is used, a dominant factor that affects the size of 3D left-and-right-eye image crosstalk (double images or "ghosting" called by professionals appear on a seen image) is a response speed of a liquid crystal screen. The faster the response speed of the liquid crystal screen is, the smaller the 3D crosstalk is, and the better the 3D effect is.
  • the temperature is a key factor that affects the response speed of the liquid crystal screen, with decrease of an environment temperature, the response speed of liquid crystal will decrease accordingly, image switching also slows down accordingly, in a situation where a backlight on time node is unchanged, image switching is not synchronized with the backlight on time node to cause 3D image crosstalk to be serious.
  • 3D image crosstalk at 10 degrees centigrade is 3-6 times the 3D image crosstalk at normal temperatures. In other words, as the temperature becomes lower and lower, the 3D left-and-right-eye image crosstalk is serious, and a 3D image browsed by the audience is less clear.
  • a main objective of the present invention is to provide an anti-crosstalk method and apparatus for an image of a 3D liquid crystal display apparatus, aimed at achieving synchronization between time nodes of image switching and switch-on of a backlight and reducing occurrence of 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.
  • the present invention puts forward an anti-crosstalk method for an image of a 3D liquid crystal display apparatus, the method comprising:
  • the method comprises:
  • step A comprises:
  • step A comprises:
  • the method comprises:
  • the present invention further puts forward an anti-crosstalk apparatus for an image of a 3D liquid crystal display apparatus, the apparatus comprising:
  • the apparatus further comprises an analysis module, the analysis module is configured to judge whether the current temperature value is less than a preset threshold; the processing module is configured to: when the current temperature value is less than a preset threshold, determine, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to the current temperature value, and through the control module, perform delay adjustment on a backlight on time node according to the determined delay duration, and control a backlight source to be switched on according to the time node after delay adjustment; and the acquisition module is configured to: when the current temperature value is greater than or equal to the preset threshold, acquire the current temperature value of the area where the 3D liquid crystal display apparatus is located at regular time or in real time.
  • the analysis module is configured to judge whether the current temperature value is less than a preset threshold
  • the processing module is configured to: when the current temperature value is less than a preset threshold, determine, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay
  • the acquisition module is configured to acquire temperature values with a particular number of times in a particular position within a preset time; and average the acquired temperature values, to obtain the current temperature value
  • the acquisition module is configured to acquire current temperature values of a plurality of particular positions; and average the acquired temperature values, to obtain the current temperature value of the area where the 3D liquid crystal display apparatus is located.
  • the acquisition module is further configured to acquire 3D display crosstalk data respectively corresponding to a first temperature threshold and a second temperature threshold; and the processing module is further configured to determine a mapping relationship between a temperature and the 3D display crosstalk data according to a mapping relationship between backlight on time and the 3D display crosstalk data and the 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold; and determine and prestore a mapping relationship between a temperature value and backlight on delay duration according to the mapping relationship between the temperature and the 3D display crosstalk data and the 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold.
  • the present invention determines backlight on delay duration corresponding to the current temperature value of the 3D liquid crystal display apparatus according to a prestored mapping relationship between a temperature value and backlight on delay duration, performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment.
  • An on time of a backlight source is correspondingly adjusted at a different temperature, so that time nodes of image switching and switch-on of a backlight are synchronized, thereby reducing occurrence of a 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.
  • FIG. 1 is a schematic flowchart of a first embodiment of an anti-crosstalk method for an image of a 3D liquid crystal display apparatus according to the present invention.
  • FIG. 1 the flowchart shown in FIG. 1 is merely a preferred embodiment, and those skilled in the art should know that any embodiment constructed around the idea of the present invention should not depart from the scope covered by the following technical solution: acquiring a current temperature value of an area where the 3D liquid crystal display apparatus is located; determining, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to the current temperature value; and performing delay adjustment on a backlight on time node according to the determined delay duration, and controlling a backlight source to be switched on according to the time node after delay adjustment.
  • a temperature sensor is disposed in a particular position of the 3D liquid crystal display apparatus, it should be avoided that the particular position is disposed in the position where a light-emitting device of the 3D liquid crystal display apparatus is located or its vicinity, to prevent heat radiated by the light-emitting device from affecting collection of temperature data
  • the particular position may be a center position of the 3D liquid crystal display apparatus, a position in four corners or any position except for the position where the light-emitting device of the 3D liquid crystal display apparatus is located and its vicinity, and the number of the particular positions may be one, may also be two, and may also be any other suitable number set by a user in advance, which are not limited one by one herein.
  • the manner of implementing the 3D function of the 3D liquid crystal display apparatus is black field insertion, that is, the whole 3D liquid crystal display area is updated from a white field to a black field, or the whole 3D liquid crystal display area is updated from a black field to a white field.
  • one particular position is disposed in the 3D liquid crystal display apparatus, that is, preferably, a temperature sensor is disposed in one position.
  • the acquiring a current temperature value of an area where the 3D liquid crystal display apparatus is located is acquiring temperature values with a particular number of times in a particular position within a preset time, and averaging the acquired temperature values, to obtain the current temperature value, and may also be sorting the acquired temperature values in an order from high to low, and averaging the temperature values except the highest temperature value and the lowest temperature value, to obtain the current temperature value.
  • the preset time may be 1s or 2s or any other time intervals set by the user in advance, and the particular number of times may be 3 times or 4 times or other suitable number of times set by the user in advance.
  • the manner of acquiring a current temperature value of an area where the 3D liquid crystal display apparatus is located is as follows: acquiring current temperature values of a plurality of particular positions; and averaging the acquired temperature values, to obtain the current temperature value of the area where the 3D liquid crystal display apparatus is located, or acquiring current temperature values of a plurality of particular positions; and after the highest one and the lowest one in the acquired temperature values are removed, averaging the remaining temperature values, to obtain the current temperature value of the area where the 3D liquid crystal display apparatus is located.
  • the manner of implementing the 3D function of the 3D liquid crystal display apparatus is backlight partition scanning, in which a temperature sensor may be disposed in one particular position of each backlight partition or temperature sensors are disposed in a plurality of particular positions of each backlight partition.
  • backlight on delay duration corresponding to the current temperature value is determined according to a prestored mapping relationship between a temperature value and backlight on delay duration, that is, a duration of switch-on of backlight at the current temperature to be delayed relative to a prestored standard backlight on time is obtained; the delay adjustment is performed on the backlight on time node according to the determined delay duration, and the backlight source is controlled to be switched on according to the time node after delay adjustment.
  • This embodiment determines backlight on delay duration corresponding to the current temperature value of the 3D liquid crystal display apparatus according to a prestored mapping relationship between a temperature value and backlight on delay duration, performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment.
  • An on time of a backlight source is correspondingly adjusted at a different temperature, so that time nodes of image switching and switch-on of a backlight are synchronized, thereby reducing occurrence of a 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.
  • FIG. 2 is a schematic flowchart of a second embodiment of the anti-crosstalk method for an image of a 3D liquid crystal display apparatus according to the present invention.
  • step S11 the method comprises:
  • a response time of liquid crystal varies with a change in the temperature, generally, above a normal temperature (25 degrees), the response speed of the liquid crystal is relatively stable, the response time of liquid crystal will not change evidently with increase of the temperature, but with decrease of the temperature, the response speed of the liquid crystal becomes increasingly slower, and when the temperature is decreased below a certain temperature (10 degrees), the response time of liquid crystal will be close to an image update cycle, the liquid crystal display apparatus cannot work normally, and it is difficult to eliminate influences of decrease of the response speed of the liquid crystal on the display image.
  • the preset threshold is 25 degrees, when the acquired current temperature is less than the preset threshold, step S12 and step S13 are performed, and when the current temperature is greater than or equal to the preset threshold, the response time of liquid crystal will not change evidently (will not increase evidently), step S11 is performed at regular time or in real time, to obtain the current temperature value of the 3D liquid crystal display apparatus (return to perform step S11, and detect the temperature of the 3D liquid crystal display apparatus in real time or at regular time), so as to adjust backlight on time of the 3D liquid crystal display apparatus.
  • the preset threshold of the temperature being 25 degrees is a first threshold
  • a second threshold of the temperature is set, and the second threshold is 10 degrees (when the 3D liquid crystal display apparatus is at the temperature, the response time of liquid crystal will be close to an image update cycle, and the 3D liquid crystal display apparatus cannot work normally)
  • the current temperature value is less than the first threshold
  • step S12 and step S 13 are performed, when the current temperature value is less than the second threshold, it is very difficult to eliminate influences of the response speed of liquid crystal molecules on the image
  • the backlight on time is adjusted according to the maximum backlight on delay duration obtained by performing step S12 and step S13.
  • the first threshold and the second threshold are determined according to that the liquid crystal has response in an effective temperature interval, that is, when the first threshold is above the corresponding temperature value, the response speed of the liquid crystal will not increase evidently; when the second threshold is below the corresponding temperature value, it is difficult to eliminate influences of the response speed of liquid crystal molecules on the image.
  • whether the current temperature value of the 3D liquid crystal display apparatus is within a preset range is judged, when the acquired current temperature value of the 3D liquid crystal display apparatus is within the preset range, an on time of a backlight source is adjusted, so as to prevent that adjusting the on time of a backlight source according to the acquired current temperature value of the 3D liquid crystal display apparatus not within the preset range results in a problem of non-synchronization of 3D display, thereby further increasing the 3D display effect of the 3D liquid crystal display apparatus.
  • FIG. 3 is a schematic flowchart of a third embodiment of an anti-crosstalk method for an image of a 3D liquid crystal display apparatus according to the present invention.
  • the method further comprises:
  • response speeds of liquid crystal of different 3D liquid crystal display apparatuses are different, and influences of temperatures on the response speeds of liquid crystal also vary, it is relatively difficult to accurately obtain a relationship between temperatures and 3D display crosstalk data when each display screen is at different temperatures, which does not facilitate operation.
  • a backlight on time point is unchanged, with decrease of the temperature, the response time of liquid crystal also increases. Therefore, a time interval between the backlight on time point and an image update area also increases.
  • the backlight on time point is decreased, and the time interval between the backlight on time point and the image update area also increases.
  • a relationship of influences of the temperature on the 3D display crosstalk can be converted to a relationship between the backlight on time point and the image update area.
  • the response time of liquid crystal becomes slow, and pixel points for completing image update reflected on an actual display image decrease, that is to say, it takes longer time to complete update of pixel points to be updated for the actual display image, equivalent to that the response time of liquid crystal increases, when the response time of liquid crystal is constant, the backlight on time point is decreased, and the time interval between the backlight on time point and the image update area also increases accordingly; therefore, the relationship of influences of the temperature on the 3D display crosstalk can be converted to a relationship between the temperature and update of pixel points of the image, and further can be converted to a relationship between the backlight on time point and update of pixel points of the image, that is, a relationship between the backlight on time point and an image update area.
  • the backlight on time point is adjusted and the size of the corresponding 3D display crosstalk data is acquired, to obtain a mapping relationship between the backlight on time point and the 3D display crosstalk data and obtain a relation curve (as shown in FIG. 6A ) between the backlight on time point and the 3D display crosstalk data, two end points of the 3D liquid crystal display apparatus in the relation curve at the first temperature threshold and the second temperature threshold are obtained from the relation curve of FIG.
  • 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold of the 3D liquid crystal display apparatus
  • the first temperature threshold and the second temperature threshold are two end points in an effective temperature interval of changes of the response time of liquid crystal
  • 3D crosstalk data between the end points is 3D crosstalk data of the 3D liquid crystal display apparatus at different temperatures
  • 3D display crosstalk data corresponding to the first temperature threshold and the second temperature threshold in a different 3D liquid crystal display apparatus is different, according to the 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold, a mapping relationship between a temperature value of an area where the 3D liquid crystal display apparatus is located and the 3D display crosstalk data is obtained from a mapping relationship between the backlight on time point and the 3D display crosstalk data, a relation curve between the temperature and the backlight on time point as shown in FIG.
  • a mapping relationship between a temperature value and the backlight on delay duration is determined and prestored according to a mapping relationship between a temperature value and the 3D display crosstalk data and a mapping relationship between the backlight on time point and the 3D display crosstalk data.
  • a mapping relationship between a temperature value of the different 3D liquid crystal display apparatus and backlight on delay duration can be obtained.
  • a mapping relationship between a temperature value of the different 3D liquid crystal display apparatus and backlight on delay duration is obtained, to adjust an on time of a backlight source according to the acquired current temperature value of the 3D liquid crystal display apparatus, so that time nodes of image switching and switch-on of a backlight are synchronized, thereby reducing occurrence of a 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.
  • FIG. 4 is a function module diagram of a first embodiment of an anti-crosstalk apparatus for an image of a 3D liquid crystal display apparatus according to the present invention.
  • the apparatus comprises an acquisition module 10, a processing module 20 and a control module 30.
  • the acquisition module 10 is configured to acquire a current temperature value of a display area of the 3D liquid crystal display apparatus.
  • a temperature sensor is disposed in a particular position of the 3D liquid crystal display apparatus, to prevent heat radiated by a light-emitting device from affecting collection of temperature data, it should be avoided that the particular position is disposed in the position where the light-emitting device of the 3D liquid crystal display apparatus is located or its vicinity, the particular position may be a center position of the 3D liquid crystal display apparatus, a position in four corners or any position except for the position where the light-emitting device of the 3D liquid crystal display apparatus is located and its vicinity, and the number of the particular position may be one, may also be two, and may also be any other suitable number set by a user in advance, which are not limited one by one herein.
  • the manner of implementing the 3D function of the 3D liquid crystal display apparatus is black field insertion, that is, the whole 3D liquid crystal display area is updated from a white field to a black field, or the whole 3D liquid crystal display area is updated from a black field to a white field, preferably, one particular position is disposed in the 3D liquid crystal display apparatus, that is, preferably, a temperature sensor is disposed in one position.
  • the acquisition module 10 acquires a current temperature value of an area where the 3D liquid crystal display apparatus is located means acquiring temperature values with a particular number of times in a particular position within a preset time, and averaging the acquired temperature values, to obtain the current temperature value, which may also be sorting the acquired temperature values in an order from high to low, and averaging the temperature values except the highest temperature value and the lowest temperature value, to obtain the current temperature value.
  • the preset time may be 1s or 2s or any other time intervals set by the user in advance, and the particular number of times may be 3 times or 4 times or other suitable number of times set by the user in advance.
  • the manner in which the acquisition module 10 acquires a current temperature value of an area where the 3D liquid crystal display apparatus is located is as follows: the acquisition module 10 acquires current temperature values of a plurality of particular positions; and averages the acquired temperature values, to obtain the current temperature value of the area where the 3D liquid crystal display apparatus is located, or acquires current temperature values of a plurality of particular positions; and after the highest one and the lowest one in the acquired temperature values are removed, averages the remaining temperature values, to obtain the current temperature value of the area where the 3D liquid crystal display apparatus is located.
  • the manner of implementing the 3D function of the 3D liquid crystal display apparatus is backlight partition scanning, and it is feasible to dispose a temperature sensor in one particular position of each backlight partition or dispose temperature sensors in a plurality of particular positions of each backlight partition.
  • the processing module 20 is configured to determine, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to the current temperature value.
  • the control module 30 is configured to perform delay adjustment on a backlight on time node according to the determined delay duration, and control a backlight source to be switched on according to the time node after delay adjustment.
  • the processing module 20 determines backlight on delay duration corresponding to the current temperature value according to a prestored mapping relationship between a temperature value and backlight on delay duration, that is, obtains a duration of switch-on of backlight at the current temperature to be delayed relative to a prestored standard backlight on time; the control module 30 performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment.
  • the current temperature value of the area of the 3D liquid crystal display apparatus acquired by the acquisition module 10 is 16 degrees
  • the processing module 20 obtains according to a prestored mapping relationship between a temperature value and backlight on delay duration that backlight on delay duration is 2 ms
  • the processing module 20 determines backlight on delay duration corresponding to the current temperature value of the 3D liquid crystal display apparatus according to a prestored mapping relationship between a temperature value and backlight on delay duration, and the control module 30 performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment.
  • An on time of a backlight source is correspondingly adjusted at a different temperature, so that time nodes of image switching and switch-on of a backlight are synchronized, thereby reducing occurrence of a 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.
  • FIG. 5 is a function module diagram of a second embodiment of an anti-crosstalk apparatus for an image of a 3D liquid crystal display apparatus according to the present invention.
  • the apparatus further comprises an analysis module 40.
  • the analysis module 40 is configured to judge whether the current temperature value is less than a preset threshold.
  • the processing module 20 is configured to: when the current temperature value is less than a preset threshold, determine, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to the current temperature value, and through the control module, perform delay adjustment on a backlight on time node according to the determined delay duration, and control a backlight source to be switched on according to the time node after delay adjustment.
  • the acquisition module 10 is configured to: when the current temperature value is greater than or equal to the preset threshold, acquire the current temperature value of the area where the 3D liquid crystal display apparatus is located at regular time or in real time.
  • a response time of liquid crystal varies with a change in the temperature, generally, above a normal temperature (25 degrees), the response speed of the liquid crystal is relatively stable, the response time of liquid crystal will not change evidently with increase of the temperature, but with decrease of the temperature, the response speed of the liquid crystal becomes increasingly slower, and when the temperature is decreased below a certain temperature (10 degrees), the response time of liquid crystal will be close to an image update cycle, the liquid crystal display apparatus cannot work normally, and it is difficult to eliminate influences of decrease of the response speed of the liquid crystal on the display image.
  • the preset threshold is 25 degrees
  • the processing module 20 determines, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to a current temperature value of a 3D liquid crystal display apparatus, and through the control module 30, performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment; and when the current temperature is greater than or equal to the preset threshold, the response time of the liquid crystal will not change evidently (will not increase evidently), the acquisition module 10 acquires the current temperature value of the area where the 3D liquid crystal display apparatus is located at regular time or in real time, to obtain the current temperature value of the 3D liquid crystal display apparatus, so as to adjust backlight on time of the 3D liquid crystal display apparatus.
  • the preset threshold of the temperature being 25 degrees is a first threshold
  • a second threshold of the temperature is set, the second threshold is 10 degrees (when the 3D liquid crystal display apparatus is at the temperature, the response time of the liquid crystal will be close to an image update cycle, and the 3D liquid crystal display apparatus cannot work normally)
  • the processing module 20 determines, according to a prestored mapping relationship between a temperature value and backlight on delay duration, backlight on delay duration corresponding to a current temperature value of a 3D liquid crystal display apparatus, and through the control module 30, performs delay adjustment on a backlight on time node according to the determined delay duration, and controls a backlight source to be switched on according to the time node after delay adjustment; when the current temperature value is less than the second threshold, it is very difficult to eliminate influences of the response speed of liquid crystal molecules on the
  • the first threshold and the second threshold are determined according to that the liquid crystal has response in an effective temperature interval, that is, when the first threshold is above the corresponding temperature value, the response speed of the liquid crystal will not increase evidently; when the second threshold is below the corresponding temperature value, it is difficult to eliminate influences of the response speed of liquid crystal molecules on the image.
  • the analysis module 40 first judges whether the current temperature value is greater than a second threshold, and when the current temperature is greater than the second threshold, judges whether the current temperature is less than the first threshold.
  • the analysis module 40 judges whether the acquired current temperature value of the 3D liquid crystal display apparatus is within a preset range, when the acquired current temperature value of the 3D liquid crystal display apparatus is within the preset range, the control module 30 adjusts an on time of a backlight source, so as to prevent that adjusting the on time of a backlight source according to the acquired current temperature value of the 3D liquid crystal display apparatus not within the preset range results in a problem of non-synchronization of 3D display, thereby further increasing the 3D display effect of the 3D liquid crystal display apparatus.
  • the acquisition module 10 is further configured to acquire 3D display crosstalk data respectively corresponding to a first temperature threshold and a second temperature threshold; and the processing module 20 is further configured to determine a mapping relationship between a temperature value and the 3D display crosstalk data according to a mapping relationship between backlight on time and the 3D display crosstalk data and the 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold; and determine and prestore a mapping relationship between the temperature value and backlight on delay duration according to the mapping relationship between the temperature and the 3D display crosstalk data and the first temperature threshold and the second temperature threshold.
  • response speeds of liquid crystal of different 3D liquid crystal display apparatuses are different, and influences of temperatures on the response speeds of liquid crystal also vary, it is relatively difficult to accurately obtain a relationship between temperatures and 3D display crosstalk data when each display screen is at different temperatures, which does not facilitate operation.
  • a backlight on time point is unchanged, with decrease of the temperature, the response time of liquid crystal also increases. Therefore, a time interval between the backlight on time point and an image update area also increases.
  • the backlight on time point is decreased, and the time interval between the backlight on time point and the image update area also increases.
  • a relationship of influences of the temperature on the 3D display crosstalk can be converted to a relationship between the backlight on time point and the image update area.
  • the response time of liquid crystal becomes slow, and pixel points for completing image update reflected on an actual display image decrease, that is to say, it takes longer time to complete update of pixel points to be updated for the actual display image, equivalent to that the response time of liquid crystal increases, when the response time of liquid crystal is constant, the backlight on time point is decreased, and the time interval between the backlight on time point and the image update area also increases accordingly; therefore, the relationship of influences of the temperature on the 3D display crosstalk can be converted to a relationship between the temperature and update of pixel points of the image, and further can be converted to a relationship between the backlight on time point and update of pixel points of the image, that is, a relationship between the backlight on time point and an image update area.
  • the backlight on time point is adjusted and the size of the corresponding 3D display crosstalk data is acquired, to obtain a mapping relationship between the backlight on time point and the 3D display crosstalk data and obtain a relation curve (as shown in FIG. 6A ) between the backlight on time point and the 3D display crosstalk data, two end points of the 3D liquid crystal display apparatus in the relation curve at the first temperature threshold and the second temperature threshold are obtained according to 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold acquired by the acquisition module 10 of the 3D liquid crystal display apparatus from the relation curve of FIG.
  • the first temperature threshold and the second temperature threshold are two end points in an effective temperature interval of changes of the response time of liquid crystal
  • 3D crosstalk data between the end points is 3D crosstalk data of the 3D liquid crystal display apparatus at different temperatures
  • 3D display crosstalk data corresponding to the first temperature threshold and the second temperature threshold in a different 3D liquid crystal display apparatus is different, according to the 3D display crosstalk data respectively corresponding to the first temperature threshold and the second temperature threshold
  • the processing module 20 obtains a mapping relationship between a temperature value of an area where the 3D liquid crystal display apparatus is located and the 3D display crosstalk data from a mapping relationship between the backlight on time point and the 3D display crosstalk data, obtains a relation curve between the temperature and the backlight on time point as shown in FIG.
  • mapping relationship between a temperature value and the backlight on delay duration determines and prestores a mapping relationship between a temperature value and the backlight on delay duration according to a mapping relationship between a temperature value and the 3D display crosstalk data and a mapping relationship between the backlight on time point and the 3D display crosstalk data.
  • a mapping relationship between a temperature value of the different 3D liquid crystal display apparatus and backlight on delay duration can be obtained.
  • the processing module 20 according to a response time of liquid crystal of a different 3D liquid crystal display apparatus and 3D display crosstalk data respectively corresponding to temperature values of two end points in an effective variation interval, obtains a mapping relationship between a temperature value of the different 3D liquid crystal display apparatus and backlight on delay duration, to enable the control module 30 to adjust an on time of a backlight source according to the acquired current temperature value of the 3D liquid crystal display apparatus, so that time nodes of image switching and switch-on of a backlight are synchronized, thereby reducing occurrence of a 3D display crosstalk of the 3D liquid crystal display apparatus, to enable a user to browse a clearer and more realistic 3D image.

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  • Engineering & Computer Science (AREA)
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  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP14867220.7A 2013-12-03 2014-07-30 Procédé et appareil anti-scintillation destinés à l'image d'un appareil d'affichage à cristaux liquides 3d Ceased EP3079145A4 (fr)

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PCT/CN2014/083276 WO2015081710A1 (fr) 2013-12-03 2014-07-30 Procédé et appareil anti-scintillation destinés à l'image d'un appareil d'affichage à cristaux liquides 3d

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CN111965860B (zh) * 2020-08-12 2023-11-28 Tcl华星光电技术有限公司 液晶显示器响应时间的量测系统及其量测方法

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CN103617786A (zh) 2014-03-05
US20160104433A1 (en) 2016-04-14
CN103617786B (zh) 2016-08-17
US9761179B2 (en) 2017-09-12
WO2015081710A1 (fr) 2015-06-11

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